使用 Exchange Web Service (EWS) 更新會議的做法


請參考下列的程式碼粗體字的時間指定. 若沒有指定, 時間會變成 UTC . 

Central Standard Time 可以指定為 Taipei Standard Time 即為台北的時區.

 

static void UpdateAppointmentTimeZone(ExchangeService service, ItemId apptId, bool shiftAppointment)

{

    PropertySet includeTimeZones = new PropertySet(AppointmentSchema.Subject,

                                                   AppointmentSchema.Start,

                                                   AppointmentSchema.ReminderDueBy,

                                                   AppointmentSchema.End,

                                                   AppointmentSchema.StartTimeZone,

                                                   AppointmentSchema.EndTimeZone);

 

    Appointment apptToUpdate;

 

    // Load the existing appointment.

    // This will result in a call to EWS.

    try

    {

        apptToUpdate = Appointment.Bind(service, apptId, includeTimeZones);

    }

    catch (Exception ex)

    {

        Console.WriteLine("Error retrieving existing appointment: {0}", ex.Message);

        return;

    }

 

    Console.WriteLine("Before update:");

    // Output the current start, reminder, end, and time zones.

    Console.WriteLine("  Start: {0}", apptToUpdate.Start);

    Console.WriteLine("  Start time zone: {0}", apptToUpdate.StartTimeZone.DisplayName);

    Console.WriteLine("  Reminder: {0}", apptToUpdate.ReminderDueBy);

    Console.WriteLine("  End: {0}", apptToUpdate.End);

    Console.WriteLine("  End time zone: {0}", apptToUpdate.EndTimeZone.DisplayName);

 

    // Retrieve the Central time zone.

    TimeZoneInfo centralTZ = TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time");

 

    // Update the time zones on the appointment.

    apptToUpdate.StartTimeZone = centralTZ;

    apptToUpdate.EndTimeZone = centralTZ;

 

    if (!shiftAppointment)

    {

        // Set the start and end times explicitly so that the appointment

        // will start and end at the same UTC time.

 

        // Convert the times to then Central time zone. This

        // will keep them at the same time in UTC.

        // For example, 1:00 PM Eastern becomes 12:00 PM Central.

        DateTime newStartTime = TimeZoneInfo.ConvertTime(

            apptToUpdate.Start, centralTZ);

 

        DateTime newEndTime = TimeZoneInfo.ConvertTime(

            apptToUpdate.End, centralTZ);

 

        apptToUpdate.Start = newStartTime;

        apptToUpdate.End = newEndTime;

    }

 

    try

    {

        // Save the changes. This will result in a call to EWS.

        apptToUpdate.Update(ConflictResolutionMode.AlwaysOverwrite,

            SendInvitationsOrCancellationsMode.SendToNone);

    }

    catch (Exception ex)

    {

        Console.WriteLine("Error updating appointment: {0}", ex.Message);

        return;

    }

 

    // Now rebind to the appointment to get the new values.

    Appointment apptAfterUpdate;

    

    try

    {

        // This will result in a call to EWS.

        apptAfterUpdate = Appointment.Bind(service, apptId, includeTimeZones);

    }

    catch (Exception ex)

    {

        Console.WriteLine("Error retrieving existing appointment: {0}", ex.Message);

        return;

    }

 

    Console.WriteLine("After update:");

    // Output the current start, reminder, end, and time zones.

    Console.WriteLine("  Start: {0}", apptAfterUpdate.Start);

    Console.WriteLine("  Start time zone: {0}", apptAfterUpdate.StartTimeZone.DisplayName);

    Console.WriteLine("  Reminder: {0}", apptAfterUpdate.ReminderDueBy);

    Console.WriteLine("  End: {0}", apptAfterUpdate.End);

    Console.WriteLine("  End time zone: {0}", apptAfterUpdate.EndTimeZone.DisplayName);

}

 

For more information: https://msdn.microsoft.com/en-us/library/office/dn789030(v=exchg.150).aspx

HTH. Jacky

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